【题目】Happiness is a feeling ________ there is always something or somebody lighting up your eyes and making you want to sing for no reason.
A. when B. which C. whether D. that
在线课程【答案】D
【解析】考查同位语从句。句意：幸福是一种感觉，这种感觉总是有东西或某人点燃你的眼睛，让你想要无缘无故地唱歌。句中从句是feeling的同位语从句，解释说明feeling的内容，故用that引导，故选D。